Hours ago at the Microsoft E3 Press Conference, Halo 4 was unveiled, along with the news of an entirely new trilogy of Halo games, confirming Halo 5 and 6 as well. Check out the trailer above, and below we’ll break it down for you.

The trailer starts with a beating heart. Cortana’s muffled voice can be heard in the background, urging the Chief to get up. The camera pans to his brain – he wakes up, realizes what’s happening, and jumps out of the cryo-chamber. For one of the only times in the series, Cortana calls the Chief by his first name, John, suggesting that their relationship is a lot closer considering the loneliness they faced at the end of Halo 3. The ship they’re on is exploding, presumably under attack, but from what? The Covenant are largely gone, with most of their religious drive gone after the events of Halo 3, and the Elites and Grunts have partnered with the humans. Then the Chief makes his escape, grabbing what looks to be a pistol – but then fires a grenade, blasting the door in front of him open. As he looks out, we see a closer view of the gun, which looks similar to the Halo 1 pistol but with a grenade attachment on the barrel of the gun. When the camera pans back, we see what is most likely the ship the Chief and Cortana were on at the end of Halo 3, and then – in the background – an enormous artifact (ship? the planet at the end of Halo 3?), whose center (loading bay?) opens up, and the trailer ends abruptly.

There are a number of questions this trailer raises, but most importantly: What will we fight in Halo 4? Since the Covenant have nothing to fight for and the Gravemind has been defeated, Halo 4 has to introduce a new enemy, a new plot arc, and answer deeper questions about the Forerunners and mythos of the Halo universe.